Engineering students from Johns Hopkins University have created an edible, adhesive tape, called "Tastee Tape," to keep burritos and other wrapped foods sealed up . . . WHILE you're eating.
They tested a "multitude" of ingredients before settling on a final recipe, which is edible, safe, and has the strength to keep even the fattest burrito closed. For now, they aren't revealing what the secret formula is . . . because they're currently applying for a patent. It's also unclear when it could be available.
The "tape" looks like small rectangular strips that are roughly half an inch by two inches. They come on a wax paper . . . and to use them, you just peel one off, wet it thoroughly, and stick it on the food you want to hold together.
(Here's a clear and a dyed example of Tastee Tape.)